JPH064302B2 - Device for bending and folding the lid of a container - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates generally to container forming and sealing machines, and more particularly to folding and folding devices for closing end caps of paper containers.

BACKGROUND OF THE INVENTION Folding and folding devices have been known for some time and have been used in container forming, filling and sealing devices for liquid products such as dairy products and fruit juices. Such conventional devices typically include rotatable arms or blades that are disposed oppositely and rub against the heat-activated plastic coated panel surface so that they are printed or colored. The surface is easily scratched or damaged. A representative example of such a blade is shown and described in US Pat. No. 3,398,659.

OBJECT OF THE INVENTION A general object of the invention is to provide a folding and folding device for folding container panels along preformed fold lines.

Another object of the invention comprises means for minimizing the rubbing or rubbing between the device and the panel to be folded,
An object is to provide an improved folding and folding device.

Another object of the invention is to provide at the tips of oppositely positioned rotatable blades or arms a roller which is free to rotate with the panel during displacement so that it is engaged by the roller and It is an object of the present invention to provide a folding and folding device that substantially eliminates relative movement between each panel being folded.

Description of the Embodiments In detail with reference to the drawings, FIG. 1 illustrates a fixed shoe 10 and a drive assembly 12 that may include a pair of adjacent rollers 11. Number 13 in FIG.
The stationary shoe 10 and drive assembly 12 are attached to a container forming, filling and sealing apparatus, shown at. An open-ended, heat-activated, four-sided shape attached to the mandrel 15 and comprising a front end lid extending beyond the mandrel end, a rear end lid and two lateral end lids, The plastic coated paper container 14 is moved in the direction of arrow A across the drive assembly 12 and the fixed shoe 10 by means of a three-mandrel 15.

The drive assembly 12 comprises two blade assemblies 16 and 18, each disposed in a freely rotatable manner facing each other. Each blade assembly 16 and 18 comprises a barrel member 20 fixed at one end to a rotatable shaft 22 by any clamping means.

A fixed pivot bin 26 oriented in the longitudinal direction is fixed adjacent to the tip of each body member 20. A disk roller or rotating blade 28 is mounted on the fixed pivot bin 26 in an unrestrained or free rotating state via a bearing 30 (see FIG. 4) and uses a snap ring 32 in an annular groove 34 formed in the fixed pivot pin 26. Retained there by any suitable method such as. The disk roller 28 has a side edge 38 (first
And FIG. 2) extend laterally from the side surface 40 of the barrel member 20 and have respective lateral end lids or panels 42 having diagonal fold lines 43 (see FIG. 2A). It acts as a prebreaker to prebreak each side panel along the diagonal fold line 43 to ensure inward bending of the base of the side panel with respect to the horizontal fold line 44. The four edge lids are joined together at their lateral edges by longitudinal fold lines 45, so that the lateral panels 42
With the inward pre-break, the front and rear end coat lids are also retracted inward as shown in part in FIG.

In operation, the paper container 14 with the open end is in the direction of arrow A (first
(See the figure) and is moved across the drive assembly 12 towards the fixed shoe 10. When the rearwardly extending rear end lid or rear lid panel 46 of the container passes through the drive assembly 12, the shafts 22 on both sides are timed to rotate clockwise and counterclockwise, respectively, and the circular arc shape of the disc roller 28 is adjusted. The edges 36 of the rear lid panel 46 into engagement with the respective outer edges of the rear lid panel 46. Since the disc roller rotates freely,
Upon engagement with the rear lid panel 46, they rotate on the bearings in response to the forward movement of the rear lid panel and body member 20, respectively, while the rear lid panel is folded to the crease line 4.
8 is gradually pushed up and thereby moves with the rear lid panel surface and does not rub across the rear lid panel surface. Therefore, the printing of the container panel and / or the scratches or pains of the colored surface under such contact condition are eliminated, and the end cap having a good appearance is provided. This is especially important if the end lid to be closed and sealed is a top lid that is well visible in a store display.

As the carton 14 is advanced forward, the front end lid or front lid panel 50 engages the stationary shoe 10 and then moves across it, thereby folding the crease line at the base of the front lid panel. It is rotated about the center, and as shown in FIG. 3, the superposition of the end caps 46 is completed, but the disc roller 28 is taken out from between them.

INDUSTRIAL APPLICABILITY The present invention folds a printed, thermoplastic-plastic-coated paper container by rolling it rather than rubbing the rubbing and tacking members across the finished surface. And to provide an improved means of closing and thereby eliminating scratches and sores on the container surface that occur during the closing operation.

(Effects of the Invention) According to the present invention, in particular, the panel surface arranged in the longitudinal direction of the container is subjected to a force from the direction orthogonal to the folding direction to fold or fold the container surface Scuffs and sores are eliminated.

Although the present invention has been described above based on the embodiments, it should be noted that many modifications can be made within the present invention.

[Brief description of drawings]

FIG. 1 is a plan view of the folding and folding apparatus of the present invention. FIG. 2 is an exemplary view of a processing operation of a hollow container in the apparatus of FIG. FIG. 2A is a partially enlarged side view of the end cover in a state prior to the work shown in FIG. FIG. 3 illustrates a situation in which the processing work is further advanced.
FIG. 5 is a partially enlarged side view of the illustrated device and associated container end cap. 4 is a partially enlarged side view of a portion of the apparatus of FIG. FIG. 5 is a partial bottom view of the end cover of the container, illustrating a working state further advanced than FIG. 3. The names of the main parts in the figure are as follows. 10: Fixed shoe 12: Drive assembly 14: Paper container 15: Mandrel 16, 18: Blade assembly 20: Body member 26: Fixed pivot bin 28: Disc roller 30: Side pin 45: Vertical fold line 46: Rear lid panel 50 : Front lid panel

Claims (3)

[Claims] 1. A folding and folding device for passing and closing a downwardly extending rear end lid of a heat-treated, plastic-coated, longitudinally oriented tubular paper container. A drive assembly, a pair of rotation shafts mounted adjacent to both ends of the drive assembly and capable of rotating in opposite directions, and fixed to one end of each rotation shaft for horizontal rotation with the pair of rotation shafts. An arm, a pivot pin attached adjacent to each tip of the arm, and a pivot pin attached to each of the pivot pins so as to be freely rotatable in a horizontal direction, and based on timed rotation of the pair of rotary shafts. A roller adapted to engage the rear end cap and thereby fold the rear end cap from a vertical position to a horizontal position while rotating about the pivot pin. Including the roller to minimize relative movement between the rear end cap and the roller, thereby preventing scratches and aches on the rear end cap during the closing operation. A device for folding and folding as described above. 2. A four-sided, heat-activated, plastic-coated paper container is passed therethrough,
For folding and folding longitudinally oriented end caps for closing front end caps, rear end caps and opposite side end caps, which are respectively connected to the longitudinal side walls of the container by horizontal fold lines. A drive assembly, a pair of shafts drivingly coupled to the drive assembly for rotation in opposite directions, secured to the pair of shafts for horizontal rotation with the pair of shafts. Based on the pair of arms and the rotation of the pair of arms, the rear end lids oriented in the longitudinal direction are contacted from the rear side and the rear end lids are moved to a substantially horizontal posture along the respective fold lines. And a pair of rollers attached to the tip of each of the pair of arms in a state where it can freely rotate in the horizontal direction, and the pair of rollers of the pair of arms and the rear end cover. Relative movement While rotating according to demand, maintaining rotation in contact with the rear end cover, thereby preventing occurrence of scratches and pain in the rear end cover during the closing operation of the rear end cover. A device for folding and folding said longitudinally oriented panel. 3. A pin is extended from the side of each pair of arms so as to come into contact with the side end cover, and acts to pre-break the side end cover inward about their fold lines. An apparatus for folding and folding a vertically oriented panel according to claim 2.